Silicon Nitride

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High Alpha-Phase Silicon Nitride Ceramic Powder

Currently, our company have achieved large-scale precision-controllable production of silicon nitride ceramic powder. The produced silicon nitride powders are characterized by high purity, high alpha-phase content, and low oxygen content, enabling controllable preparation of products with varying α-Si3N4 phase content, different particle sizes, and diverse oxygen content specifications. This ceramic powder material can be widely applied in multiple fields including high-power semiconductor substrates (IGBT), engine ceramic components, ceramic bearings, grinding media, and ceramic electric heaters.

SN-1 silicon nitride ceramic powder indicators: impurity oxygen content ≤ 1.4%, α - Si3N4 phase content ≥ 95%, D50 ≤ 0.7 μm，SN-2 silicon nitride ceramic powder indicators: impurity oxygen content ≤ 1%, α - Si3N4 phase content ≥ 93%, D50 ≤ 1.0 μm，SN-3 silicon nitride ceramic powder indicators: impurity oxygen content ≤ 1%, α - Si3N4 phase content ≥ 90%, D50 ≤ 1.0 μm，SN-4 silicon nitride ceramic powder indicators: impurity oxygen content ≤ 1%, α - Si3N4 phase content ≥ 90%, D50 ≤ 2.0 μm.

High power semiconductor substrate IGBT

Silicon nitride ceramics have excellent characteristics such as high strength, high fracture toughness, high thermal conductivity, and high insulation, making them an ideal structural material for high-power semiconductor substrates IGBT in vehicles. For the preparation of silicon nitride IGBT, high-purity, high alpha phase content, and high uniformity silicon nitride ceramic powder sintered silicon nitride substrate are required, with high requirements for the thermal conductivity, strength, and high fracture toughness of the sintered body.

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Engine structural components

For engine structural components, silicon nitride ceramics are mainly utilized for their lightweight, heat shock resistance, excellent wear resistance, high temperature corrosion resistance, and good thermal insulation properties. The use of silicon nitride structural components can reduce the weight of the engine, improve its combustion efficiency and service life.

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Ceramic bearings

Silicon nitride ceramic bearings have excellent wear resistance, electrical corrosion resistance, self-lubricating properties, diamagnetism, and insulation properties, and are an indispensable and important component of magnetic key equipment such as CT medical devices. Silicon nitride ceramic bearings have strong competitiveness in the fields of electric vehicles and wind power bearings. Currently, Tesla electric vehicles are using silicon nitride bearings on a large scale. Silicon nitride ceramic bearings have excellent resistance to electrochemical corrosion and can significantly improve the service life of automotive bearings.

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Grinding media

Silicon nitride grinding media have good wear resistance and high hardness, which can reduce the pollution of grinding materials and have significant advantages in the preparation of high-purity and high-performance powders.

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Ceramic electric heating plug

Silicon nitride ceramic heaters have excellent thermal shock resistance and high temperature stability. The heating elements inside the silicon nitride ceramic heater can raise the surface temperature of the silicon nitride ceramic material to 1000～1200 ° C within 2-10 seconds without fracture. The highest surface temperature can reach 1400 ° C, and it is widely used in fields such as automobiles, aerospace, and household heaters.